Expansion valve



a. J. cooKE EXPANS I ON VALVE Original F'i1ed Apri1 2, 1923 'latentedbec.9,192 i. I i I 1,518,183

' UNITED STATES rarsurorr ca.

nxrnnsron VALVE.

Origmai a piication filed April 2, 1923, Serial No. 629,392. Dividedthis application filed Inna 6,

' 1924. Serial m. ?18 ,348. i

To all whom it 'mlag concern: in line with the passage 12 contains arecess Be. it known that I, Grouse-J. Coons, a 24 which opens into aradially-extending. citizen of the United States, residing at relativelysmallchannel 26 in thisface and Chicago, in thecounty of Cook and Stateof opening into the chamber 14:. The recess 24 5 Illinois, have inventeda certain new and and channel 26 form a passagewaythrough 60 usefulImprovement in Expansion Valves, the end of the valve. Oneend fthe'casing of which the following is a specification.- 8 is equippedwith a stufiing box 28 and its This invention is a division of my prioropposite end is provided with a union 30, application for refrigeratingapparatus, Sethe latter containing an opening 32 there- 1 rial No.629,392, filed April 2, 1923. thru in which an intake pipe 34 issecured. 6

The invention relates to expansion valves The mechanism just describedis installed required in machines of the class described in arefrigerating apparatus, for instance in the above mentioned applicationfor althat of said prior application, in such a lowing the condensedrefrigerating material manner that compressed material isfed in 'usuallyammonia, to expand from one part thru pipe 34 and after expanding thrupas- 7 of the machinoito another, thereby producsages 12, 24 and 26 itleaves the valve device ing the necessary conditions for the refrigthrupipe 18. In the operation of such a crating work of the machines.machine the expansion device of this inven- The object of the inventionis to provide tion is arranged with the valve 22 in apa valve of thisclass which is much more eftiproximately the position shown in Fi urescient in operation than devices heretofore 1 and 2 of the drawing.Movement of the known, which can be easily and cheaply valve 22 by anoperator applying a wrench made, which are satisfactory in use, and isto its non-circular end 22f is effected to pernot readily liable to getout of order, blot-e "mil; the valve to be partially withdrawnpartioularly the invention consists in nufrom the position shown inFigures 1 and 2 80 merous features and details of construction totheright thereof to permit the more ready which will be hereafter \norefully set forth cleaning of the ports of the valve structure in thespecification and claims. by blowing compressed air or gas therethru.

Referring to the drawings in which like .The provision of the filteringmaterial in numerals indicate the same parts thruout the chamber 10 isof value as it insures b5 the several views, against the passage ofparticles of dirt, to Figure 1 is a vertical sectional detail view thesmall orifice of the ex ansion deficit-i and of the valve meehanisn'iillustrating this in: which if not interceptec might clog the vention inits preferred form. latter, whereby obstructing of the valve pasl Figure2 is a sectional detail plan view sages. is reduced to the minimum. o onthe irregular line 2-2 of Figure 1. The recess 52% and the small passage26 Figure 3 is :a sectional end'view on the at right angles to the axisof value 22 is of irregular line 3-3 of Figure 1. importance in insuringaccurate adjustment Figure 4 is a perspective'end view of the of thedevice. valve proper. Having thus described my invention what Thepreferred embodiment of the device 'I claim as newand desire to secureby Let illustrated in the drawings includes a casters Patent, is ing 8containing at one end a socket 10 for 1. An expansion devicecoinprising'a oasreceiving. any suitable filtering material, as ingcontaining a chamber havin' gagr inlet for example, absorbent cotton,this chamber and an outlet in communication, therewith, 10o opening thrua passage 12 into another a valve extending into said chamber, con-'chamber 14 from which leads a passage 16 taining a passage opening thruan end of the which opens into a discharge pipe 18. The valve into saidinlet and pening thru the oppositetend of the casing 8 contains a sideof the valve into said chamber, said '50 threaded bore 20 in which avalve pro er valve being adapted to'be adjusted into, a 22 is screwed,the inner end of this va ve position in which its passage-opens at bothY which extends into this chamber 14 being of ends into said chamber.

considerablyless diameter than the internal 2. An expansion devicecomprising a casdiameter of this chamber. The inner end ing containing achamber having an inlet-s1"; face of the valve 22 at the portion thereofand an outlet in communication .110)

a, valve extending into said chamber, containing a passage opening thruan end of the alve into said inlet and thru the side of the valve, intosaid chamber, the said pasheing cut into an end of the valve whichnormally strikes and otherwise c oses said inietpzissage, said valvebeing adapt-ed to be adjusted into a position in which its passage opensat both ends into said chamber.

3. An expansion device comprising :1 casing-containing a chamber havingan inlet and an ontlet in communication therewith, a,

valye extending into said chamber, containing a passage opening thru anend of the valve into said inlet and opening thru the side of the valveinto said chamber, the portionof said passage where it opens thru theside of the valve being restricted as compared with the opposite endthereof, said valve being adapted to be adjusted into a position inwhich its passage opens at both ends into said chamber.

In witness whereof, I have hereunto suhscribed my name.

GEORGE J. COOKE.

